to diffuse ☊ 
khuếch tán ☊ 
扩散 → ☊ kuo4san4 to spread; to proliferate; to diffuse; spread; proliferation; diffusion ☊ Khuếch tán ☊ 弥漫 → ☊ mi2man4 to pervade; to fill the air; diffuse; everywhere present; about to inundate (water); permeated by (smoke); filled with (dust); to saturate (the air with fog, smoke etc) ☊ Khuếch tán ☊